Preparation of a compact product, comprises disposing a powder of natural plant compound； realizing a powdery composition based on the natural plant compound powder, where the composition has a mass loss of >；= 4.5% at 110[deg] C in 20 minutes, a particle size of = 500 micrometers and a density of = 0.4； and compacting the powdery composition under a pressure of = 45 MPa. An independent claim is included for a compact product obtained by the process, where the product has a density of 0.65-1.1.La présente invention concerne des pastilles permettant la préparation de boissons chaudes par lixiviation, et spécialement de café. Elle concerne également le procédé de préparation permettant de fabriquer les dites pastilles.
